diff --git a/conformance/Cargo.toml b/conformance/Cargo.toml
index 42a5e851..de9a44dd 100644
--- a/conformance/Cargo.toml
+++ b/conformance/Cargo.toml
@@ -32,5 +32,5 @@ anyhow = "1"
 reqwest = { version = "0.13", features = ["json"] }
 urlencoding = "2"
 url = "2"
-p256 = { version = "0.13", features = ["ecdsa"] }
+p256 = { version = "0.14", features = ["ecdsa"] }
 base64 = "0.22"
diff --git a/conformance/src/bin/client.rs b/conformance/src/bin/client.rs
index 8dabff0f..6176fb43 100644
--- a/conformance/src/bin/client.rs
+++ b/conformance/src/bin/client.rs
@@ -658,7 +658,7 @@ fn openssl_free_ec_sign(pem: &str, client_id: &str, audience: &str) -> anyhow::R
     let signing_input = format!("{}.{}", header, payload);
 
     // Sign with p256
-    let secret_key = p256::ecdsa::SigningKey::from_bytes(raw_key.as_slice().into())
+    let secret_key = p256::ecdsa::SigningKey::from_slice(raw_key.as_slice())
         .map_err(|e| anyhow::anyhow!("Invalid EC key: {}", e))?;
     use p256::ecdsa::signature::Signer;
     let sig: p256::ecdsa::Signature = secret_key.sign(signing_input.as_bytes());